CPC Subgroup
B43K 21/08 with the writing-cores fed by screws
Full Title
Propelling pencils (projecting mechanisms for writing units B43K24/00; multiple-point writing implements B43K27/00) > Writing-core feeding mechanisms > with the writing-cores fed by screws
4 direct subcodes
Child Classifications
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- B43K 21/10 with separate writing-core remnants ejecting-bar
- B43K 21/12 with means preventing overwinding
- B43K 21/14 with writing-cores automatically replaced from magazines
Top Applicants
Top 10 applicants by patent filingsfor class B43, 2013–2023, worldwide · Source: EPO PATSTAT
- SOCIETE BIC FR 422
- MITSUBISHI PENCIL COMPANY JP 381
- PILOT CORPORATION JP 299
- MITSUBISHI PENCIL COMPANY 213
- PILOT CORPORATION 100
- WACOM COMPANY JP 89
- STAEDTLER MARS & COMPANY DE 87
- KOTOBUKI JP 82
- CRAYOLA US 78
- SANFORD US 73